MED 7300 Midterm: STAT 145 UMN Exam4 Fall09
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Stat 145 final exam (50 pts) - fall 2009. For credit show or explain all answers: marine scientists are studying great white sharks. Regardless of your answer above, given x-bar = 15. 99 and s = 1. 85 find a. 95% confidence interval for the mean length of great whites. (d) (2 pts. ) Interpret the interval above: clients at a transitional housing facility for recently released female prisoners must return to prison if they are caught using illegal drugs or alcohol. A social worker at the facility is interested in the proportion of female prisoners that return to prison from using illegal drugs or alcohol. She analyzes the records of 137 clients that entered a transitional housing facility since it opened five years ago. Of these 137 clients 29 returned to prison due to substance abuse (a) (2 pt. ) Explain in words what the parameter p is. (b) (1 pt. )
